Hypertext Maps
http://www.eastgate.com/HypertextNow/archives/Maps.html

Bernstein, Mark
Eastgate Systems
2003

Abstract:

Hypertext mapping has long challenged writers, and perplexed hypertext system designers. Clear, attractive, and informative maps help readers and writers understand the structure of complex hypertexts. Conversely, in the absence of adequate mapping tools, many writers fall back on simplistic link models like sequential lists and outlines.